Ozone generator



June 21, 1932. n. w. DAVIS ozons GENERATOR m m J a w, W m w N y 1 w m HW 2 A I A H PM, Q Q W l B U/ w4 m :55: E; v Y JVH/ E: G 55% N, x v 0 WWw m.

Patented June 21, 1932 I PATENT DEAN W. DAVIS, OI!" PENDLETON, INDIANAozoNE GENERATOR Application filed September 11, 1930. SertaI' No.481,088.

This invention relates to the art of ozone producing machines andparticularly to electrical discharge machines.

The primary objects of the invention reside in the simplified structurepermitting production at a low cost; in the safety from electrical shockto handlers of the device;

and in the unique combination and new association of the variouselements entering into the structure, reference beingmade particularlyto the discharge plates and method of mounting them.

These and other objects will become apparent in the folowing descriptionof the invention, with reference being made to the accompanying drawingin which 1 Fig. 1 is a fragmentary top plan view of a machine embodyingmy invention;

Fig. 2, a fragmentary side elevation of the 2 machine; and

Fig. 3, a detail in vertical section on the line 3-3 in Fig. 2. NReferring to the drawlng in which like characters of reference indicatelike parts in the several views, I form a base plate 10,

here shown as circular in shape, and from the center thereof, I punchthe two upwardly .turned tongues 11 and 12, between which I secure thetransformer core 13 by its lower end by the rivets 14 and 15. The core13 is laminated and closed at both ends, and carries the primary andsecondary windings combined in the coil 16 about one side thereof. Onterminal 17 of the secondar winding of the coil 16 is ounded to the ase10 by being secured un er the head of the rivet 14, and the otherterminal 18 is secured to the cylindrical metal shell 19 which ispositioned to be concentric of the plate 10 and surrounding the core 13and coil 16. An outer shell 2O rests directly by its lower end on theplate 10 to be in electrical contact therewith and carriesan inner layerof insulating material 21, such as mica, against which the outer sur-451 face of the shell 19 bears. The shell 19 is shorter in length" thanis the shell 20 and is vertically positioned to haveits lower edgespaced above the plate 10 and its top edge below the top of the shell20, the insulating material 21, however, extending the sulating material21.

length of the shell 20. From the primary winding of the coil 16 extendthe leads 22 and 23 which are carried through the material 21 and theshell 20 to form the cable 24 therebeyond. v

The entire space within the shells 19 and 20 and around the coil 16'andits core 13 is filledwith an insulating compound 25 so that the innershell 19 is completely covered over and the compound carried around itstop and bottom edges into contact with the insulating material 21.Theouter shell 20 is preferably corrugated by vertically extendingridges and depressions so that there are air spaces between the shell 20and the in- Since the shell 20 is in contact with the base' l0, there isno difference in potential at any time therebetween, and theentiremachine may be picked up by grasping the shell 20 without dangerof shock.

s a finishing piece to make the device more sightly, I provide an outerhousing 26 which is essentially an inverted cup with a plurality ofholes 27 through the side walls. The housing 26 is united to the base 10by screws 28 passed up through the base 10 and screwthreadedly throughan annular flange 29 around the lower edge ofthehousing26. The

cable 24 is carried out through an insulating bushing 30 fixed in a holethe housin 26.

Alternat ng current is passed through the primary winding of the coil 16by means of the cable 24 to induce a current in the secondary winding ofthe coil 16 of comparatively high potential. The shells 19 and 20 .beingconnected to the terminals of the secondary coil and serve as dischargeplates,

the discharge therebetween producing ozone about the shell 19,, fromwhich the ozone. may escape through the holes 27 to without the housing26. The coil 16 being completely enclosed in-the compound 25 is removedfrom damage by the ozone. It is thus to be seen that a very simple ozoneproducing device is .to be had at a relatively low cost of productionand that the device may be handled freely in moving it about from roomto room without danger. 1

in the side of 2 i ,i,eo4,174

Iclaimz' V 1. In an ozone producing device, a base plate, a tongueextending upwardly nfrom the plate, a transformer core fixed to the 5tongue, a transformer .coil carried on the core, a cylindrical outershell surrounding the core, an inner shell shorter than the outer shellat both of its ends, and insulating material separating the two shells,said coil having secondary winding terminals in circuit with saidshells.

2. In an ozone producing device, a base plate, -a tongue extendingupwardly from the plate, a transformer core fixed to the tongue,

a transformer coil carried on the core, a cylindrical outer shellsurrounding the core, an inner shell, and insulating material separatingthe two shells, said coil having secondary winding terminals 'in circuitwith said shells, said outer shell being in electrical contact by itslower end with said plate, and said inner shell being shorter than theouter shell and having its top and bottom ends below and above therespective ends .25 thereof, one of said secondary winding ter- -minalsbeing grounded to said plate, anddnsulating' compound completely fillingthe space within said shells and around said 'coil .and core tocompletely cover over said inner shell and said coil.

3. In an ozone producing device, a base plate having a' pair of integraltongues punched from the center thereof to project vertically upwards, alaminated transformer core fixed between the tongues, a transformer coilhaving primary and secondary windings carried on the core, and a pair ofconcentric discharge shells surrounding said core in electrical circuitwith said secondary winding, the inner shell being shorter at both endsthan the outer shell.

4. In an ozone producing device, a base' plate having a pair of integraltongues punched from the center thereof to project vertically upwards, alaminated transformer core fixed between the tongues, a transformer coilhaving primary and secondary windings carried on the core, and a pair ofconcentric discharge shells surrounding said core in electrical circuitwith said secondary winding, the inner shell being shorter at both endsthan the outer-shell, the outer of said shells being in contact withsaid base plate and the inner shell removed therefrom.

In testimony whereof I aflix my signature.

. DEAN W. DAVIS.

